getprotobynumber()
getprotobynumber() — Get protocol name associated with protocol number.
Built-in function of PHP 8.5. The manual lists it as available in PHP 4, PHP 5, PHP 7, PHP 8. This page is the reference card: signature, parameters and return value, plus the changelog and the example the manual provides.
What it does
getprotobynumber() returns the protocol name associated with protocol protocol as per /etc/protocols.
Signature
getprotobynumber(int $protocol): string|false
Parameters
| Parameter | Type | What it takes |
|---|---|---|
| $protocol | int | The protocol number. |
Return value
Returns the protocol name as a string, or false on failure.
Example
The PHP manual ships no example for getprotobynumber(); the signature and the parameter table above are the contract.
See also
All PHP 8.5 built-in functions
Reference card built from the PHP manual page getprotobynumber() (PHP documentation, CC BY 3.0). The page is generated from the manual, so the wording of the parameter and return value text follows php.net.